Oliver County Climate
Oliver County, North Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.6°F
Annual Precip
18.9"
Annual Snowfall
—
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4a
Minimum winter temperature range for plant survival
2,192
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Oliver County
Climate Verdict
Oliver County has a cool, averaging 42.6°F annually, semi-arid conditions with only 18.9 inches of annual precipitation, rare extreme heat with only 16.6 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 13.7°F. summers are pleasantly cool with July averaging 69.7°F. Residents experience a substantial 56°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Oliver County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Oliver County closely matches the North Dakota statewide average temperature of 40.9°F.
Climate Profile
About Oliver County Weather
Cold High-Latitude Continental Climate
Oliver County averages 42.6°F annually, falling far below the national median temperature. This climate is defined by its position in the northern plains of the U.S.
Warmer than the Average North Dakotan
Oliver is warmer than the 41.0°F state average. Its 18.9 inches of annual precipitation is slightly lower than the 19.5-inch state benchmark.
Moderate Precipitation for the Region
At 18.9 inches of precipitation, Oliver is wetter than Mercer (17.3 inches) but drier than Nelson (20.2 inches). Its 17 extreme heat days are standard for the central part of the state.
Distinct Seasons and Moderate Heat
The county experiences a July average of 69.7°F with 17 extreme heat days. Winters are cold with a 13.7°F January average, though official snowfall data is currently limited.
Home Sealing and HVAC Maintenance
Focus on sealing windows and doors to stay warm during the 16.5°F average winter months. Prepare for nearly three weeks of 90°F heat during the summer season.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.